Tunable Assembly of Vanadium Dioxide Nanoparticles to Create Porous Film for Energy-Saving Applications

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• 作者：Shangjun Ding ; Zhanqiang Liu ; Dezeng Li ; Wei Zhao ; Yaoming Wang ; Dongyun Wan ; Fuqiang Huang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：5
• 期：5
• 页码：1630-1635
• 全文大小：441K
• 年卷期：v.5,no.5(March 13, 2013)
• ISSN：1944-8252

文摘

Nanoparticle-assembled vanadium dioxide (VO₂) films have been easily prepared with the assistance of cetyltrimethylammonium vanadate (CTAV) precursor which exhibits self-assembly properties. The obtained VO₂ film has a micro/nano hierarchical porous structure, so its visible-light transmittance is significantly improved (25% increased compared to continuous film). The VO₂ particle density as well as the film porosity can be facilely controlled by adjusting experimental parameters such as dip-coating speed. Accordingly, film optical properties can also be tuned to a large extent, in particular the visible transmittance (T_vis) and near-infrared switching efficiency (螖T_nir). These VO₂ nanoparticle-assembled films prepared by this novel method provide a useful model to research the balance between T_vis and 螖T_nir.

Keywords:

vanadium dioxide; particulate film; self-assembly; porous film; optical controllability